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ap expert first negative MCQ Questions for Class 10

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2 questions tagged with ap expert first negative.

Question 1/2 Expert Mathematics Arithmetic Progressions (AP) Finding the $n$th term of an AP Class 10 Level 66

किसी समान्तर श्रेणी में \(a_1=230\) और (d=-12) है। \(a_n\) ऋणात्मक होने वाला पहला (n) क्या है?

In an AP \(a_1=230\) and (d=-12). What is the first (n) for which \(a_n\) is negative?

Explanation opens after your attempt
Correct Answer

C. (21)

Step 1

Concept

(a_n=230-12(n-1)=242-12n). From \(a_n<0\), \(n>\frac{121}{6}\), so the first (n=21).

Step 2

Why this answer is correct

The correct answer is C. (21). (a_n=230-12(n-1)=242-12n). From \(a_n<0\), \(n>\frac{121}{6}\), so the first (n=21).

Step 3

Exam Tip

(a_n=230-12(n-1)=242-12n)। \(a_n<0\) से \(n>\frac{121}{6}\), इसलिए पहला (n=21)।

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Question 2/2 Expert Mathematics Arithmetic Progressions (AP) Finding the $n$th term of an AP Class 10 Level 65

किसी समान्तर श्रेणी में \(a_1=167\) और (d=-9) है। \(a_n\) ऋणात्मक होने वाला पहला (n) क्या है?

In an AP, \(a_1=167\) and (d=-9). What is the first (n) for which \(a_n\) is negative?

Explanation opens after your attempt
Correct Answer

B. (20)

Step 1

Concept

(a_n=167-9(n-1)=176-9n). From \(a_n<0\), \(n>\frac{176}{9}\), so the first (n=20).

Step 2

Why this answer is correct

The correct answer is B. (20). (a_n=167-9(n-1)=176-9n). From \(a_n<0\), \(n>\frac{176}{9}\), so the first (n=20).

Step 3

Exam Tip

(a_n=167-9(n-1)=176-9n)। \(a_n<0\) से \(n>\frac{176}{9}\), इसलिए पहला (n=20)।

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